Note B - The Southern California Regional Gamma Knife Center (Details Textual) - USD ($)	1 Months Ended	6 Months Ended		12 Months Ended
	Feb. 29, 2024	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2007	Mar. 31, 2024	Dec. 31, 2023
Equity Method Investments		$ 193,000				$ 189,000
Income (Loss) from Equity Method Investments		$ 4,000	$ (266,000)
Corona Gamma Knife, LLC (“CGK”) [Member]
Equity Method Investment, Ownership Percentage		39.00%
Accounts Receivable, after Allowance for Credit Loss					$ 1,000	0
Corona Gamma Knife, LLC (“CGK”) [Member] | Renovation of Southern California Regional Gamma Knife Center [Member]
Agreement, Term				14 years
Loans and Leases Receivable, Related Parties, Additions	$ 1,000
NeuroPartners LLC [Member]
Equity Method Investment, Ownership Percentage		20.00%
NeuroPartners LLC and Corona Gamma Knife, LLC (“CGK”) [Member]
Equity Method Investments		$ 0				$ 0
Income (Loss) from Equity Method Investments		$ 0	$ (63,000)